3 papers
hep-th2005
A Tutorial on Links between Cosmic String Theory and Superstring Theory
Mahbub Majumdar
Cosmic superstrings are introduced to non-experts. First D-branes and strings are discussed. Then we explain how tachyon condensation in the early universe may have produce…
hep-th2003
Inflation from Tachyon Condensation, Large N Effects
Mahbub Majumdar, Anne-Christine Davis
Using only general properties of the tachyon potential we show that inflation may be generic when many branes and anti-branes become coincident. Inflation may occur because of: (1)…
hep-th2003
D-brane Anti-brane Annihilation in an Expanding Universe
Mahbub Majumdar, Anne-Christine Davis
The time-varying density of D-branes and anti-D-branes in an expanding universe is calculated. The D-brane anti-brane annihilation rate is shown to be too small to compete with the…